Tosia, Sam
Current rating: 1444
Record: 3-6
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 655 | Ricker, Ahren (1500) | Lost 1-2 | -181482 |
| 2standard | 953 | Visner, Kyle R (1482) | Won 2-1 | +181500 |
| 3standard | 758 | Cushman, Anthony D (1500) | Lost 1-2 | -181482 |
| 4standard | 941 | Coleman, Eban (1482) | Won 2-0 | +181500 |
| 5standard | 909 | Doolittle, Lawrence (1503) | Won 2-0 | +181518 |
| 6standard | 758 | Edwards, Cassidy (1519) | Lost 0-2 | -181500 |
| 7standard | 817 | Vu, Quang (1469) | Lost 0-2 | -181482 |
| 8standard | 767 | Merrill, Kenny (1389) | Lost 0-2 | -201462 |
| 9standard | 724 | Montgomery, Christopher (1464) | Lost 0-2 | -181444 |
| average opponent: 1479record: 3-6 | new rating: 1444 | |||